Patent GB-371481-A (GB)
Title: Improvements in the manufacture of materials capable of being moulded and of bodies made therefrom
IPC: D21H19/26
Filed: 1931-01-29
Abstract: Artificial resins formed from an aromatic amine and an aldehyde as described for example in Specifications 284,589, [Class 22, Cements &c.], 342,325, 342,326, 342,767, 372,075, and 372,076, [all in Group IV], are applied to supports in the form of suspensions in water or other non-solvent, the resin then being subjected to heat and pressure.  The support may be paper web, fabric, wood veneer, &c., and a number of the coated supports may be superposed to form a compound plate.  Paper or the like coated on both sides may be used to unite two other sheets of material. The suspension may be formed by wet-grinding the resin or by precipitation.  In examples: (1) An amine resin made as described in Specification 284,589 is ground in water until a homogeneous thick suspension is formed; a paper web as described in Specification 368,300, [Group IV], containing about 43 per cent of an amine resin is passed twice through the suspension and is dried at about 150 DEG  C. after each coating; the web is then cut into sheets which are superimposed, the whole being pressed between polished metal plates at 160 DEG  C. at a pressure of 150 kilos per sq. cm.  (2) A suspension made by grinding an amine resin together with 15 per cent of diethylphthalate is sprayed on to a wallpaper which is passed between two heated calendar rollers to cure the resin.  (3) A sheet of wood veneer, coated on each side with an amine resin is laid upon a stack of amine resin paper and the whole is compressed to form a compound sheet.  (4) A plywood plate is made by stacking resin-coated paper and resin-coated wood veneer in alternate layers so that the paper constitutes the bottom and top layers and the wood fibres cross each other; by compression at a suitable pressure and temperature a polished plywood plate is obtained, the grain of the wood being visible through the thin resin-coated paper. (5) A smooth plate of "Eternite" (Registered Trade Mark) is painted with a suspension of an amine resin containing 100 parts of resin, 15 parts of asbestine and 420 parts of titanium white; the coating is fixed by heat, a coloured pattern produced thereon, and the plate is pressed between polished metal plates.  Specifications 342,365, [Group XIV], and 342,723, [Group IV], also are referred to.ALSO:Artificial resins formed from an aromatic amine and an aldehyde as described for example in Specifications 284,589, [Class 2 (iii), Dyes &c.], 342,325, 342,326, 342,767, 372,075 and 372,076 are applied to supports in the form of suspensions in water or other non-solvent, the resin then being subjected to heat and pressure. Examples are given of the condensation of aniline with formaldehyde under acid conditions.  Specifications 342,365, [Group XIV], 342,723 and 368,300 also are referred to.ALSO:Artificial resins formed from an aromatic amine and an aldehyde as described for example in Specifications 284,589, [Class 22, Cements &c.], 342,325, [Group IV], 342,326, 342,767, 372,075 and 372,076 are applied to supports in the form of suspensions in water or other non-solvent, the resin then being subjected to heat and pressure.  The support may be paper web, fabric, wood veneer, &c. and a number of the coated supports may be superposed to form a compound plate.  Paper or the like coated on both sides may be used to unite two other sheets of material.  The suspension may be formed by wet grinding the resin or by precipitation.  In examples:-(1) An amine resin made as described in Specification 284,589 is ground in water until a homogeneous thick suspension is formed; a paper web as described in Specification 368,300 containing about 43 per cent of an amine resin is passed twice through the suspension and is dried at about 150 DEG  C. after each coating; the web is then cut into sheets which are superimposed, the whole being pressed between polished metal plates at 160 DEG  C. at a pressure of 150 kilos per sq. cm.  (2) A suspension made by grinding an amine resin together with 15 per cent of diethylphthalate is sprayed on to a wallpaper which is passed between two heated calender rollers to cure the resin.  (3) A sheet of wood veneer coated on each side with an amine resin is laid upon a stack of amine resin paper and the whole is compressed to form a compound sheet. (4) A plywood plate is made by stacking resin coated paper and resin coated wood veneer in alternate layers so that the paper constitutes the bottom and top layers and the wood fibres cross each other; by compression at a suitable pressure and temperature a polished plywood plate is obtained, the grain of the wood being visible through the thin resin coated paper.  (5) A smooth plate of "Eternite" (registered Trade Mark) is painted with a suspension of an amine resin containing 100 parts of resin, 15 parts of asbestine and 420 parts of titanium white; the coating is fixed by heat, a coloured pattern produced thereon, and the plate is pressed between polished metal plates.  Other examples are described. Specifications 342,365, [Group XIV], and 342,723 also are referred to.